Same problem here on a DELL Latitude E7440 with Linux Mint 17.3 (based on Ubuntu 14.04 LTS) installed. When I use a Plantronics Voyager which connects directly to the notebook's internal bluetooth chip, I get these dmesg entries:
$ dmesg | grep -i Bluetooth [ 3.994061] Bluetooth: Core ver 2.21 [ 3.994078] Bluetooth: HCI device and connection manager initialized [ 3.994082] Bluetooth: HCI socket layer initialized [ 3.994085] Bluetooth: L2CAP socket layer initialized [ 3.994095] Bluetooth: SCO socket layer initialized [ 4.014377] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 4.014381] Bluetooth: BNEP filters: protocol multicast [ 4.014384] Bluetooth: BNEP socket layer initialized [ 4.017044] Bluetooth: RFCOMM TTY layer initialized [ 4.017049] Bluetooth: RFCOMM socket layer initialized [ 4.017054] Bluetooth: RFCOMM ver 1.11 [ 4.119489] Bluetooth: hci0: read Intel version: 370710018002030d37 [ 4.119491] Bluetooth: hci0: Intel device is already patched. patch num: 37 [ 32.154782] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 32.164817] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 32.164821] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 572.934811] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 572.934815] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 572.934817] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 641.073418] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 646.105832] Bluetooth: hci0 SCO packet for unknown connection handle 257 [ 646.105837] Bluetooth: hci0 SCO packet for unknown connection handle 257 [ 646.105839] Bluetooth: hci0 SCO packet for unknown connection handle 257 The headset is not correctly recognized. Sometimes works, sometimes doesn't (sound output works better than input, microphone seems not available). In VMware Player, the headset is not recognized to add as a removable device into the VM. However if I use an almost identical headset, also a Plantronics Voyager but with a bluetooth usb dongle, I get no problems at all and I am able to add it as a removable device into the VM. So same OS, same hardware but different handling of internal bluetooth vs. bluetooth dongle. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1430696 Title: Bluetooth audio instability: Bluetooth: hci0 SCO packet for unknown connection handle Status in linux package in Ubuntu: Confirmed Bug description: (I'm creating a new bug as instructed at https://bugs.launchpad.net/ubuntu/+source/linux/+bug/898347/comments/29) I havea Nokia BH-216 bluetooth headset. Generally it works well, but randomly (after 5-15 minutes of use) it gets disconnected. The kernel log output looks like this: [ 3272.270382] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 3272.270383] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 3272.270384] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 3272.270384] Bluetooth: hci0 SCO packet for unknown connection handle 48 [ 3272.270385] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 3272.270386] Bluetooth: hci0 SCO packet for unknown connection handle 0 With quick googling this seems to be happening to other people with other hardware and distributions so i suppose this is a BT audio bug in kernel. Bug #898347 is related. Tested on up to date Ubuntu 14.10 x86_64. ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: linux-image-3.16.0-31-generic 3.16.0-31.41 ProcVersionSignature: Ubuntu 3.16.0-31.41-generic 3.16.7-ckt5 Uname: Linux 3.16.0-31-generic x86_64 ApportVersion: 2.14.7-0ubuntu8.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: vranki 2421 F.... pulseaudio /dev/snd/controlC1: vranki 2421 F.... pulseaudio CurrentDesktop: X-Cinnamon Date: Wed Mar 11 11:22:19 2015 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=71d76087-3fdf-4f57-a0f4-0b128be4d386 InstallationDate: Installed on 2015-02-12 (26 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) MachineType: LENOVO 20C600LLMS ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-31-generic root=UUID=e114ca99-f1c7-450f-a4a5-553075d92b7c ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.16.0-31-generic N/A linux-backports-modules-3.16.0-31-generic N/A linux-firmware 1.138.1 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/14/2014 dmi.bios.vendor: LENOVO dmi.bios.version: J9ET96WW (2.16 ) dmi.board.asset.tag: Not Available dmi.board.name: 20C600LLMS dmi.board.vendor: LENOVO dmi.board.version: SDK0E50510 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrJ9ET96WW(2.16):bd10/14/2014:svnLENOVO:pn20C600LLMS:pvrThinkPadEdgeE540:rvnLENOVO:rn20C600LLMS:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 20C600LLMS dmi.product.version: ThinkPad Edge E540 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1430696/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
